UBMRV or TH. 



JfasmnsedsA-rkL'ii 



'^MhLhiii. 



[(.(I 



''•'(lege, 



^t:iS, 



BULLETIN No. 455. 



NOVEMBER 1926 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



Latitude, 42" 23' 48.5" N. Longitude 72' 31' 10" W. 



Height of Ihiro meter above ground, jr ft. Above sea level, ^73-5 fi- 

 Height oj Witui Instru7}teiits J2 ft. Time used, y^th A/er. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 30.24, 14th, 9 A. 

 Minimum reduced to freezing, 29.05, i6th, 4 p. 

 Reduced maximum reading, 30.55, 14th, 9 a. 

 Reduced minimum reading, 29.34,16th, 4 p. 



Mean semi-daily reduced 30.110 



Monthly range 1.21 



Air Temperature. In Degrees Fahr. 



Highest 69.0, 16th, 2 P. 



Lowest 15.0, 12th, 7-30 A. 28th, 8 a. 



Mean hourly 38.9 



Mean of means of max. and min 39.8 



Mean sensible (wet bulb) 35. S 



Monthly range 54 



Highest mean daily 62.3, i6th 



Lowest mean daily 24.5, 28th 



Mean maximum 49.8 



Mean minimum 30.0 



Mean daily range 19.8 



Greatest daily range 35.0, loth. 



Least daily range 10.0,23d 



Hnmidity. 



Mean dew point 31.8 



Mean force of vapor 238 



Mean relative humidity 80.8 



Precipitation. In inches. 



Total precipitati(jii, in inches 5.38 



Total snow, in inches \ 



Number of days on which .01 inch or more 

 rain fell 9 



Wintl. 



Total movement 46c8m 



Greatest daily movement 441m, i6th 



Least daily movement 21m, i6th 



Mean daily movement 154m 



Mean hourly velocity 6.4ni 



Maximum pressure per squarefoot, i9.olbs = 



62MI per hour, 16th, 2 P., S. 

 Maxinuim velocity for 5 minutes, 36m per 



hour, i6th, 2 P., S. 

 Prevailing direction. West 



Summary. 



South 20 per cent. 



Northwest 17 " " 



North Northwest i.5 " " 



Southwest 13 " " 



West 10 " " 



Other directions 27 " " 



Weather. 

 Mean cloudiness observed .... 49 per cent 

 Total cloudiness recorded by the Sun 



Thermoineter . . 209 hours = 70 per cent 



Number of clear days 2 



Number of fair days 9 



Number of cloudy days 19 



Rriiiht Suunhiue. 



Number hours recorded, 89 — 30 per cent. 



Kaiii. 2d, 5th, 9th, loth, i6tli, iStii, 19th, 



23d, 26th, 27th, 30th, 

 Snow, 5th, loth, 23d. 



Frosts before the 16th, 5th. btli, 12th, 



Gnles. 38m, jth, S. W.: 40m, lotli, N. W.; 36m 

 nth,'N. \V.; 62m, 16th, S.: 37m, 20th, W.: 

 49m, 24th. \V.: 50m, 27tii, N. \\'.: 35m, 29tli, 



